Portal:Astrobiology

From Wikipedia, the free encyclopedia

Astrobiology

Astrobiology is the study of the origin, evolution, distribution, and future of extraterrestrial life. This interdisciplinary field takes up the search for habitable environments in our Solar System and habitable planets outside our Solar System, the search for evidence of prebiotic chemistry, laboratory and field research into the origins and early evolution of life on Earth, and studies of the potential for life to adapt to challenges on Earth and in outer space. Astrobiology addresses the question of whether life exists beyond Earth, and how humans can detect it if it does.

Astrobiology makes use of physics, chemistry, astronomy, biology, molecular biology, ecology, planetary science, geography, and geology to investigate the possibility of life on other worlds and help recognize biospheres that might be different from the biosphere on Earth. Astrobiology concerns itself with interpretation of existing scientific data; given more detailed and reliable data from other parts of the universe, the roots of astrobiology itself—physics, chemistry and biology—may have their theoretical bases challenged. Although speculation is entertained to give context, astrobiology concerns itself primarily with hypotheses that fit firmly into existing scientific theories.

Selected article

The structure of Silane
Hypothetical types of biochemistry are forms of biochemistry speculated to be scientifically viable but not proven to exist at this time. While the kinds of living beings we know on Earth commonly use carbon for basic structural and metabolic functions, water as a solvent and DNA or RNA to define and control their form, it is possible that undiscovered life-forms could exist that differ radically in their basic structures and biochemistry from that known to science.

The possibility of extraterrestrial life being based on these "alternative" biochemistries is a common subject in science fiction, but is also discussed in a non-fiction scientific context.

Selected biography

Carl Sagan Planetary Society.JPG
Carl Edward Sagan was an American astronomer, astrophysicist, cosmologist, author, science popularizer, and science communicator in astronomy and natural sciences. He spent most of his career as a professor of astronomy at Cornell University where he directed the Laboratory for Planetary Studies. He published more than 600 scientific papers and articles and was author, co-author or editor of more than 20 books. He advocated scientifically skeptical inquiry and the scientific method, pioneered exobiology and promoted the Search for Extra-Terrestrial Intelligence (SETI).

Selected picture

ALH84001 structures.jpg
Credit: NASA

The Allan Hills meteorite, when examined under an electron microscope. Could those chain structures be evidence of microbial life from mars?

Categories

To display all subcategories click on the "►":
Astrobiology(11 C, 108 P)
Astrobiologists(71 P)
Alien language(1 C, 2 P)
Anthropic principle(8 P)
ExoMars(8 P)
Extraterrestrial life(7 C, 50 P)
Extremophiles(18 C, 26 P)
Astrobiology journals(4 P)
Panspermia(18 P)
Planetary habitability(2 C, 9 P)
Square Kilometre Array(11 P)

WikiProjects

Topics

Related portals

Associated Wikimedia

The following Wikimedia Foundation sister projects provide more on this subject:

Wikibooks
Books

Commons
Media

Wikinews 
News

Wikiquote 
Quotations

Wikisource 
Texts

Wikiversity
Learning resources

Wikivoyage 
Travel guides

Wiktionary 
Definitions

Wikidata 
Database

Wikispecies 
Species

Purge server cache


Retrieved from "https://en.wikipedia.org/w/index.php?title=Portal:Astrobiology&oldid=778449241"
This content was retrieved from Wikipedia : http://en.wikipedia.org/wiki/Portal:Astrobiology
This page is based on the copyrighted Wikipedia article "Portal:Astrobiology"; it is used under the Creative Commons Attribution-ShareAlike 3.0 Unported License (CC-BY-SA). You may redistribute it, verbatim or modified, providing that you comply with the terms of the CC-BY-SA